Typically, however, the application calls IMFMediaEngine::OnVideoStreamTick first, to determine whether a new frame is available. If OnVideoStreamTick returns S_OK, the application then calls TransferVideoFrame.

Typically, however, the application calls IMFMediaEngine::OnVideoStreamTick first, to determine whether a new frame is available. If OnVideoStreamTick returns S_OK, the application then calls TransferVideoFrame.